Shears eor sheet metal



UNITED STATES PATENT OFFFICE.

HENRY C. DOLE, OF ADRIAN, MICHIGAN.

SHEARS FOR SHEET METAL.

Specication of Letters Patent No. 15,069, dated June 10, 1856.

To all whom it may concern Be it known that I, HENRY C. DOLE, of thecity of Adrian, in the county of Lenawee, in the State of Michigan, haveinvent-ed a new and useful Machine for Cutting Sheet Iron, Tin, andother Like Materials; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation ofthe same, reference being had to the annexed drawings, making a part ofthis specification, in which- Figure l is a general view of the machine;Fig. 2 represents the top blade of the shears; Fig. 3 represents theeccentric; Fig. 4 represents the bottom part of the shears; Fig. 5represents the blade, or knife; Fig. 6 represents the rod which attachesthe two motions made by the eccentric; Fig. 7 represents a top view ofthe shears and of the table on which and by which iron is cut into anysize desired without the inconvenience of marking.

The following is the explanation of the construction and operation ofthe machine.

Fig. l shows an elevation of the machine with the shears partly closed,when it will be seen by raising the handle or lever e to a perpendicularposition that the blade Z will be raised clear of the lower blade C byreason of the upper part of b being made to slide in the groove f, asthe wheel works on its aXis at a. It will also be seen that when thehandle is brought down to a horizontal position that the shears will bequite closed by pressing the lower edge of the eccentric wheel upon thetop of the blade at b. At the other end of the shears will be seenanother eccentric wheel seen at N, which works on its aXis y in the samemanner, with this difference: the pitman y', lo, being attached fartherfrom the aXis in N than it is in its moving power H it will thereforenot move N as far as H is moved, and consequently the shears will notraise and fall at the back end as much as they will at the front end.The holes seen at v o o' are to adjust the shears .at this end. Theshears move as seen at z', at which point a slot is cut, as seen at Z,Fig. 2. This slot is covered with a Washer, seen at R, Fig. 1. The slotallows the joint z' to move up or down to suit the movements of theblade made by the eccentric wheel. It will now be seen that by thismovement a shear is maintained the entire length of the blade, whereaswithout this movement the shear angle would be lost at the front endwhere the shears were near closing, as the two edges would become nearlyparallel. In Fig. l Kscrew-heads are seen at 3, 3, 3, 3, 3, &c., whichfasten the steel blades to the cast iron beds, and 1cm/,mm &c., arescrews which serve to regulate and adjust the edges of the blade bybringing them to a cutting position t-he entire length of the shears.

Fig. 6 shows a plan of the pitman seen in Fig. l at j, le.

Fig. 3 shows an elevation of the eccentric wheel and lever seen at H,Fig. l. y

Fig. i shows an elevation for the bed for the lower blade, attached towhich are guide arms or posts of an inch apart, between which theeccentric wheel is placed, its aXis being at a, and the upper blade ismade to slide between these posts, as seen in Fig. l and Fig. 7

Fig. 7 shows a plan of Fig. l. e shows the lever; a, a, the arms orposts. K, K, Fig. 7, are cast iron tables, one placed each side of theshears, on which to place the sheets of iron while cutting. Q is amovable slide set to any given length by means of the thumb screws seenat al and inserted into a block that slides in the channels seen at t,t. On the other side of the shears is another slide or gage, seen at M,adjusted the same as Q.. 0, 0, o are short slides adjusted with thumbscrews the same as M and Q, and slide in the channels m, m, m.. Thesesmall gages are for the purpose of squaring sheets of iron on the tableof any width.

The Figs. 1, 2, 3, 4, 5 and so o-n are inches figured on the tables foradjusting the gages for cutting sheet-iron any desired width or length.

C, Fig. 7 shows the thickness of the blades as set in the shears.

Fig. 5 shows an elevation of a steel blade and X shows a section of thesame.

I claim as my invention- The employment of pitman J, K, levers andeccentric wheels N, H, constructed as described for operating theblades, C, D, in connection with the adjustable gage Q, in the mannerand for the purpose set forth, and I disclaim all other improvements inthe premises.

HENRY o. DOLE.

Test:

WM. L. GREENLY, F. R. SMITH.

